Promise? Haku x Chihiro

(Takes place six years after the events of spirited away.)
Chihiro is now 16 years old and entering her junior year. She reminisces about her adventures with Haku but, as she gets older she wonders if she just imagined it all. When she goes back to the place where it all began she is given a mysterious pink flower; reigniting her hope that Haku and the whole spirit realm are out there.